shadow/libmisc/chowndir.c

133 lines
3.6 KiB
C

/*
* Copyright 1992, 1993, Julianne Frances Haugh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <config.h>
#include "rcsid.h"
RCSID("$Id: chowndir.c,v 1.6 2000/08/26 18:27:17 marekm Exp $")
#include <sys/types.h>
#include <sys/stat.h>
#include "prototypes.h"
#include "defines.h"
#include <fcntl.h>
#include <stdio.h>
/*
* chown_tree - change ownership of files in a directory tree
*
* chown_dir() walks a directory tree and changes the ownership
* of all files owned by the provided user ID.
*/
int
chown_tree(const char *root, uid_t old_uid, uid_t new_uid, gid_t old_gid, gid_t new_gid)
{
char new_name[1024];
int rc = 0;
struct DIRECT *ent;
struct stat sb;
DIR *dir;
/*
* Make certain the directory exists. This routine is called
* directory by the invoker, or recursively.
*/
if (access(root, F_OK) != 0)
return -1;
/*
* Open the directory and read each entry. Every entry is tested
* to see if it is a directory, and if so this routine is called
* recursively. If not, it is checked to see if it is owned by
* old user ID.
*/
if (! (dir = opendir (root)))
return -1;
while ((ent = readdir (dir))) {
/*
* Skip the "." and ".." entries
*/
if (strcmp (ent->d_name, ".") == 0 ||
strcmp (ent->d_name, "..") == 0)
continue;
/*
* Make the filename for both the source and the
* destination files.
*/
if (strlen (root) + strlen (ent->d_name) + 2 > sizeof new_name)
break;
snprintf(new_name, sizeof new_name, "%s/%s", root, ent->d_name);
/* Don't follow symbolic links! */
if (LSTAT(new_name, &sb) == -1)
continue;
if (S_ISDIR(sb.st_mode) && !S_ISLNK(sb.st_mode)) {
/*
* Do the entire subdirectory.
*/
if ((rc = chown_tree (new_name, old_uid, new_uid,
old_gid, new_gid)))
break;
}
#ifndef HAVE_LCHOWN
/* don't use chown (follows symbolic links!) */
if (S_ISLNK(sb.st_mode))
continue;
#endif
if (sb.st_uid == old_uid)
LCHOWN(new_name, new_uid,
sb.st_gid == old_gid ? new_gid:sb.st_gid);
}
closedir (dir);
/*
* Now do the root of the tree
*/
if (! stat (root, &sb)) {
if (sb.st_uid == old_uid)
LCHOWN(root, new_uid,
sb.st_gid == old_gid ? new_gid:sb.st_gid);
}
return rc;
}